geometry
posted by sarah a
The lengths of segments PQ and PR are 8 inches and 5 inches, respectively, and they make a 60degree angle at P.
(a) Find the area of triangle PQR.
(b) Find the length of the projection of segment PQ onto segment PR.
(c) Find the length of segment QR.

Reiny
a) area = (1/2)(5)(8)sin60
= ..
b) the projection of PQ on PR = 5 cos 60
= ...
c) use the cosine law
QR^2 = 5^2 + 8^2  2(5)(8)cos60
= ... 
yadlay
Reiny,help, how do I find the following
(d) Find the sizes of the other two angles of triangle PQR.
(e) Find the length of the median drawn to side PQ.
(f) Find the length of the bisector of angle R.
(g) Find the third side of another triangle that has a 5inch side, an 8inch side, and the
same area as triangle PQR
Respond to this Question
Similar Questions

geometry
The lengths of segments PQ and PR are 8 inches and 5 inches, respectively, and they make a 60degree angle at P. (a) Find the area of triangle PQR. (b) Find the length of the projection of segment PQ onto segment PR. (c) Find the length … 
geometry
Triangle PEA has a 20degree angle at P and a 120degree angle at E, and the length of side EA is 6 inches. Find the lengths of the other two sides of this triangle. 
geometry
5. The lengths of segments PQ and PR are 8 inches and 5 inches, respectively, and they make a 60degree angle at P. (a) Find the area of triangle PQR. (b) Find the length of the projection of segment PQ onto segment PR. (c) Find the … 
Trig
The lengths of segments PQ and PR are 8 inches and 5 inches, respectively, and they make a 60degree angle at P. (a) Find the area of triangle PQR. (b) Find the length of the projection of segment PQ onto segment PR. (c) Find the length … 
math pls
The lengths of segments PQ and PR are 8 inches and 5 inches, respectively, and they make a 60degree angle at P. (d) Find the sizes of the other two angles of triangle PQR. (e) Find the length of the median drawn to side PQ. (f) Find … 
geometry/math pls help
The lengths of segments PQ and PR are 8 inches and 5 inches, respectively, and they make a 60degree angle at P. (1) Find the sizes of the other two angles of triangle PQR. (2) Find the length of the median drawn to side PQ. (3) Find … 
geometry
A segment 12" long is divided into two segments having lengths in the ratio of 2:3. Find the length of each segment. (Hint: Let 2x and 3x represent the length of the parts.) x = ? 
Geometry
The sides AB and AC of triangle ABC have lengths of 4 inches and 7 inches, respectively. The median AM is 3.5 inches. What is the EXACT length of BC. Show your work. 
geometry
if the lengths of the sides of one triangle are 2 inches 5 inches and 7 inches respectively in the shortest leg of a similar triangle is 4 inches what is the perimeter of the second triangle in inches? 
Geometry
Please check my answers 1. A triangle has side lengths of 34 in, 20 in, and 47 in. Is the triangle acute, obtuse or right?